METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY ELEMENT

• Main Authors: TEMUKAA ENU RUTSUKUMONGAZAN, KO HIDEMASA, NAKAGAWA YUTAKA, KUWATA TAKESHI, NAGANO HIDEYUKI, ONISHI TAKANORI
• Format: Patent
• Language: English
• Published: 04.02.1994
• Edition: 5
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE:To suppress variation in an optical state small by selecting row electrode subgroups so that specific requirements are satisfied. CONSTITUTION:Selective voltages are applied to row electrodes R1-R4 and a time interval T is a time interval for selecting a row electrode subgroup once when N row electrodes are all divided into row electrode subgroups at every L row electrode. Here, while the specific requirements are satisfied the row electrode subgroups are selected. Namely. (1) L is represented as kNT/tau and determined so that k=20-250, where N is the number of all the row electrodes of the liquid crystal display element, T is the selective time of one row electrode, and T is the mean response time (second) of the liquid crystal display element. (2) Voltages which have a positive or negative amplitude Vr (Vr>0) about an intermediate voltage are applied to the row electrodes when they are selected and the intermediate voltage is applied when not.